Description: 342 / (20) With Signal Or Energy Processing

Hierarchy/Derived subclasses

342 / 20-> 21-> 22
  -> 22.1-> 22.2
 -> 23-> 24-> 25
   -> 26
   -> 27
   -> 28
  -> 29-> 29.1
   -> 29.3-> 29.31
   -> 29.4
   -> 29.5-> 29.51
   -> 29.6
   -> 30
   -> 31
   -> 32-> 33
   -> 34-> 34.1-> 34.11
    -> 34.2
    -> 34.3-> 34.31
    -> 34.4
   -> 35
   -> 36
   -> 37
   -> 38
   -> 39
   -> 40
   -> 42-> 42.1
    -> 42.2
    -> 42.3
   -> 43-> 43.1
   -> 44
   -> 45
   -> 46
 -> 47-> 48

CIPO searches

search just 342/20

- or -

search hierarchy!

The "search hierarchy!" link will execute this search:
((342/20 <IN> CPC) <OR> (342/21 <IN> CPC) <OR> (342/22 <IN> CPC) <OR> (342/22.1 <IN> CPC) <OR> (342/22.2 <IN> CPC) <OR> (342/23 <IN> CPC) <OR> (342/24 <IN> CPC) <OR> (342/25 <IN> CPC) <OR> (342/26 <IN> CPC) <OR> (342/27 <IN> CPC) <OR> (342/28 <IN> CPC) <OR> (342/29 <IN> CPC) <OR> (342/29.1 <IN> CPC) <OR> (342/29.3 <IN> CPC) <OR> (342/29.31 <IN> CPC) <OR> (342/29.4 <IN> CPC) <OR> (342/29.5 <IN> CPC) <OR> (342/29.51 <IN> CPC) <OR> (342/29.6 <IN> CPC) <OR> (342/30 <IN> CPC) <OR> (342/31 <IN> CPC) <OR> (342/32 <IN> CPC) <OR> (342/33 <IN> CPC) <OR> (342/34 <IN> CPC) <OR> (342/34.1 <IN> CPC) <OR> (342/34.11 <IN> CPC) <OR> (342/34.2 <IN> CPC) <OR> (342/34.3 <IN> CPC) <OR> (342/34.31 <IN> CPC) <OR> (342/34.4 <IN> CPC) <OR> (342/35 <IN> CPC) <OR> (342/36 <IN> CPC) <OR> (342/37 <IN> CPC) <OR> (342/38 <IN> CPC) <OR> (342/39 <IN> CPC) <OR> (342/40 <IN> CPC) <OR> (342/42 <IN> CPC) <OR> (342/42.1 <IN> CPC) <OR> (342/42.2 <IN> CPC) <OR> (342/42.3 <IN> CPC) <OR> (342/43 <IN> CPC) <OR> (342/43.1 <IN> CPC) <OR> (342/44 <IN> CPC) <OR> (342/45 <IN> CPC) <OR> (342/46 <IN> CPC) <OR> (342/47 <IN> CPC) <OR> (342/48 <IN> CPC))

This will show what classes derive from the input. Ex: entering 78/35 shows the derived classes and the search that can be used to find patents in those subclasses.
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